Origin: place of attachment
Insertion: where it bends
Belly: the prominent flesh part of the skeletal muscle
Agonist: front side; produces motion
Antagonist: back side; resting the motion ex) elbox extension
Synergist: an organ that cooperates with another or others to produce or enhance an effect
Fixator: muscles that stabilize the origin of the prime mover/agonist so it can wore more efficiently
Rectus: fibers run parallel to the midline
Transverse: fibers run perpindicular to the midline
Oblique: fibers run diagonally to the midline
Maximus: largest
Minimus: smallest
Longus: longest
Brevis: shortest
Magnus: large
Major: thick muscle
Minor: thin muscle
Vastus: largest
Biceps: 2 origins
Triceps: 3 origins
Quadriceps: 4 origins
Deltoid: triangular shape
Trapezius: trapezoid shape
Serratus: saw-toothed shape
Rhomboid:diamond shape
Orbicularis: a circular muscle
Abductor: move bone away from the midline

Adductor: move bone toward the midline
Flexor: decreases the angle at the joint
Extensor: increases the angle at the joint
Levator: produces an upward movement
Depressor: produces a downward movement
Supinator: turns the palm upward
Pronator: turns the palm downward
external image trapezius.jpg1.png

http://nicktumminello.com/2010/07/the-truth-about-the-trapezius-muscle-part-1-upper-and-mid-traps/